1) Each BROCKHAGE® Bump Hammer Set is designed to be the exact correct weight to allow you have the most success bumping most any lock.
2) There are no weights to mess with. This lock bumping set will bump most any lock with our adjustment.
3) The bump head is round which allows you to spare your fingers from injury if you miss, (which is common). We found that square head models can be very painful and even remove skin from your fingers if you do miss.
4) Our Hammers are manufacturered by BROCKHAGE®, which we stand behind.