Snow Studs SS11RStuds for all Tracks Caracteristics Oversized and pointed tungsten carbide Hot-dipped steel and galvanized stud Prevents sinking in the tire Big tread for good anchoring Possibility of installing on thin rubber Good durability Light Easy to install and dismantle 24, 100, 150, 200 and 1000 unit packages Installation Tool Included SS = Shoulder Stud (with shoulder) R = Racing (the carbide is pointed) Applications Safety boots, Snowmobile, Motocross, Enduro, ATV, Mini tractor, Snowblower Technical Information Always pre-drill with 1/16 "drill bit for snowmobile tracks. Ease installing and in pre-drilling we are sure we are going to be in the middle of the track and that we are going to go right. Add soap on the stud treads for better penetration. For a 120'' track, you need about 180 studs For 137'' track, you need about 200 studs For 144'' track, you need about 250 studs For the pattern of a snowmobile track, take the toughest studs. Specifications Length: 11 mm Thread diameter: 4.5 mm Unit per package: 200 Lock-nuts or nuts included: Yes Backers included: No Model: SS11R Number: 103159